Pipe hoister for pumps



March 24, 1931.

F.E.PROCK$H PIPE HOISTER FOB PUMPS Filed July 1, 1929 2 Sheets-Sheet l Ihvcnior fraazc'alfzifrocfiz'siz M QMw/EM zqftorney March 24, 1931.

. F. E. PROCKISH PIFIE HOISTER FOR PUMPS Filed July 1, 1929 2 Sheets-Sheet 2 I IV if Inventor Fran 0231731 21967? 217/2 A itorney Patented Mar. 24, 1931 UNITED STATES FRANCIS E. PROOKISH, F WESTMORELAND, KANSAS PIPE HOISTER FOR PUMPS Application filed July 1,

This invention relates to devices for removing pipes and the like from wells, and the primary object of the invention is to provide an improved hoisting device or grapple whereby broken pump rods and the like may witllli ease and efiiciency be extracted from the we Another very important object of the invention is to provide a grapple for the purpose specified which will be very simply constructed, the construction embodying but few parts, to facilitate ready and easy assembly and disassembly of the device, further to provide a grapple that is positive in operation,

thoroughly reliable, practical and otherwise well adapted for the purpose desired.

Other objects and advantages of the device will become apparent during a study of the following description, taken in connection with the accompanying drawings, wherein: Figure 1 is a front elevational view of my improved pipe hoister,

Figure 2 is a side elevation thereof, Figure 3 is a front elevation of a gripping arm embodying a part of this invention,

Figure 4 is a top plan View of the top plate to which the arms are adapted tobe secured, Figure 5 is a detail sectional view taken substantially on the line 55 of Figure 1,

Figure 6 is a detail sectional view taken substantially on line 66 of Figure 1 and look- 7 ing in the direction of the arrows.

With reference more in detail to the drawings, it will be seen that the present invention comprehends the provision of a circular disk like top plate 5 provided with diametrically opposed openings 6.

The openings 6 on the plate are adapted to receive the loop extremities 77 respectively of the legs 8-8 of an inverted substantially U-shaped yoke or bail 9 the bight portion of which is formed to provide an eye 10 adapted to receive therethrough one end of a hoisting hook. The top plate 5 is further provided with diametrically opposed substantially half-moon shaped openings 1111. A pair of gripping arms 12-12 are shouldered at their upper ends as at 14, said arms at said shoulders being provided with hooks 14:.

The hooks of the respective gripping arms 1929. Serial N0. 375,080.

12 are adapted tobe passed through the half moon shaped opening formed in the plate 5 so as to grip the plate at opposite diametrical points on the periphery of the plate. The shoulders 14 formed on the arms 12 will of course be disposed beneath the under face of the plate and are adapted to contact with the plate so as to prevent the hooks 14 unhooking or shoving up through the notches 11 upon upward movement of the arms.

Thus it will be seen that the arms 12-12 depend in spaced parallelism from opposite diametrical sides of the plate and the said arms intermediate their ends are each reinforced as at 15, the inner opposed faces at this reinforced portion tapering longitudinally toward the opposite end of the respective arms.

Opposed eye bolts 16 pass through the arms at this point for threaded engagement with the arms as shown in Figure 5. At their low er or opposite ends each of the arms 12 have lateral extensions 17 the extensions on the respective arms curving inwardly toward one another as clearly suggested in Figure 6. Extending transversely across the lower end of each of the arms and terminating at the outer edge of the extensions 17 is a curved plate 18.

The plates 18 are secured in any manner to the respective arms through the medium of rivets or similar fastening elements 19. The inner opposed faces of the plates 18 are corrugated or otherwise formed to provide teeth 20. Normally the arms 12 are maintained in vertical spaced parallelism, by suitable means to be hereinafter more fully described, and are to be drawn inwardly-toward one another so that the lower ends 18 of the respective arms grip therebetween one end of a'pipe' or similar article such as a pump cylinder that is to be drawn from the well. i

This is clearly suggested in Figure 1. Plate 5 is provided with a center opening 21 and a suitable loop or eye structure 22 has the socket portion thereof extended through this opening 21 for threaded engagement with one end of a rod 13, for suspending the rod 13, from the plate between draw arms '12.

The rod 13 is of a length substantially half the length of the arms 12. However, this is immaterial, provided that the rod is a sufficient length as to permit of the eye structure 24, which is threadedly engaged with the lower end of said rod to be disposed between and in substantial alinement with the eye bolts 16.

Connecting links 25 which in this instance are in the nature of elongated loops are passed through the eye 24 and through the eye bolts 16 respectively as shown. To draw the rod 13 upwardly through the center opening formed in the plate 5 the eye 22 may have secured thereto a suitable rope or other connecting element shown in broken line in Figure 2 so that a pull may be exerted upon the rod 13, and this upward movement of the rod 13 so caused will of course tend to draw the arms 12 inwardly toward one another at their lower ends for gripping engagement through the medium of the toothed plates 18 with the device or article to be hoisted.

Thus it will be seen that the links 25 act as it were as a pivotal connection between the said arms 12 and the lower end of the rod 23 while the hook 14 at the upper end of the said arms likewise functions as a pivotal connection between the plate and the said arms.

The curved plates 18 will or" course snugly fit about the periphery of the tubular element to be drawn upwardly by the grapple and the teeth formed on the plate suitably bite into the article when the arms 12 are moved inwardly for engagement with the same, while of course the pull exerted on the rod 13 will maintain the teeth in biting relation with the article as long as such pull is exerted upon the rod.

Obviously by pulling on the rope or other connection that may be lined to the eye of the bail 9 the entire device or article may be readily withdrawn from the well.

From the foregoing it will be seen that I have provided a pipe hoister of this character, which is suitably constructed, positive in operation, strong, durable and otherwise well adapted for the purpose for which it is designed.

Even though I have herein shown and described the preferred embodiment, it is to be understood that the same is susceptible to changes, fully comprehended by the spirit of the invention, and the scope of the appended claims.

Having thus described my invention, what I wish to claim is:

1. In a device of the character described, a plate, oppositely disposed gripping arms carried by said plate, a suspension bail carried by said plate, said plate having a centrally disposed opening formed therein, a rod slidable through said opening in the plate, eye bolts carried by said arms between the ends of the arms, an eye structure upon said rod at'opposite ends of said rod, one of said pair of gripping arms, hooks formed on the eye structures adapted to rest on said plate, looped members passing through first mentioned eye bolts and through the eye structure on the lower end of said rod, gripping teeth carried on said arms on the opposed faces of the arm at the free end of said arm.

2. A device of the class described, a substantially circular top plate, having diametrically opposed openings formed therein, a

upper ends of said arms..receivable in said openings, a curved plate carried by each of said arms at the lower ends of said arms, teeth formed on the inner opposed faces of said curved plate, and means slidable through said top plate and adapted for engagement with said arms for drawing said curved plates inwardly toward one another for engagement with an article adapted to be re-. ceived therebetween. V

3. A device of the class described, a substantially circular plate, a suspension bail carried by said plate, a pair of cooperating gripping arms, hooks carried by the arms at the upper ends of said arms for engagement with the plate at diametrically opposite points on the plate, said arms being each provided at their lower end with lateral extensions, a toothed plate carried by each of said said lowerends, said circular plate being provided with a center opening, a rod slicable through the opening, links connecting one end of said rod with the intermediate portion of said arms, and means operatively connected with said rod at theopposite end 109 of said rod for drawing said rod through the opening whereby said arms may be drawn inwardly toward one another for urging the toothed plate into gripping engagement with an article received therebet-ween.v

. n a: r 1 plate, said plate having an opening therethrough, a rod slidable through said opening, eye bolts carried by saidarms between the no ends of the arms, an eye structure on one end of said rod, and loop members passing through said eye structure on one end of said rod and the eyes on said arm to provide a loose connection between said rod and said 115 arms, whereby when said rod is moved in one direction through the opening in said plate, the free ends of said arms aremoved inwardly toward one another for gripping an article therebetween.

. In testimony whereof I aflix my signature.

FRANCIS E. PROCKISH. 

